JP6499828B2 - Crushing liner and crushing apparatus provided with the same - Google Patents

Description

  The present invention relates to a pulverization liner that pulverizes phosphate rock, limestone, manganese dioxide, titanium oxide, coke, and the like by using pulverization, classification, and pneumatic transportation in combination, and a pulverization apparatus including the same.

  2. Description of the Related Art Conventionally, a pulverizing apparatus is known in which an object to be processed is rotated inside a cylindrical pulverization chamber and pulverized by a liner attached to the peripheral surface of the pulverization chamber in order to crush resin, minerals, and the like. Conventionally, there are various pulverization methods such as a method in which an object to be processed is placed on a swirling airflow and collides with a liner, and a method in which pulverization is performed in a gap between a rotating rotor and a liner in a pulverization chamber.

  In general, this liner is made of an annular integral member, has a complicated shape with irregularities formed on the inner peripheral surface, and uses a wear-resistant material that is difficult to process. When some parts were worn or damaged, the entire parts had to be replaced.

  Therefore, as in Patent Document 1, a liner divided in the circumferential direction is known. A screw hole is formed in the crushing chamber to which the liner is attached, and each divided liner is fixed to a positioning member inserted into the screw hole. By moving the positioning member forward and backward, the clearance between each divided liner and the pulverizing blade attached to the rotor can be adjusted, and only the worn divided liner needs to be replaced.

JP 2007-326044 A

  However, even in the patent document 1 liner, the size of each of the four divided liners is still large, and there is room for improvement in labor and cost of processing and replacement.

  The present invention has been made in view of the above points, and an object of the present invention is to facilitate maintenance of the pulverization liner and reduce replacement costs.

  In order to achieve the above object, according to the present invention, a plurality of liner chips are respectively attached to the chip insertion recesses on the outer peripheral base.

Specifically, in the first invention, on the premise of a pulverization liner that pulverizes the abutted material,
In the above grinding liner,
A cylindrical outer base attached to the main casing of the crusher;
A plurality of chip insertion recesses that are recessed integrally with a space in the circumferential direction on the radially inner side of the outer periphery base;
And a plurality of liner tips having higher wear resistance than the outer peripheral base , which are replaceably attached to the plurality of chip insertion recesses, respectively.

  According to the above configuration, since the outer peripheral base and the liner chip are separated from each other, the liner chip is downsized and inexpensive. Further, since the shape of the liner chip itself is simplified, the processing becomes easy, and a high-hardness wear-resistant material can be used.

In the second invention, in the first invention,
The liner chip has inclined surfaces whose intervals are narrowed toward the inner peripheral side on the side surface,
The chip insertion recess has an abutted surface that is inclined so that an interval between the inclined surfaces of the liner chip engages with each other toward the inner peripheral side.

  According to the above configuration, the inclined surfaces whose intervals become narrower toward the inner periphery of the liner chips are engaged with the contact surfaces that are similarly inclined in the recess for inserting the chip, so that the liner chips can be pulled out toward the inner periphery. It is surely prevented.

In the third invention, in the second invention,
A pressing member that presses the liner chip toward the inner peripheral side is provided in the chip insertion recess.

  According to the above configuration, the pressing member presses the inclined surface of the liner chip against the contact surface of the chip insertion recess, so that the liner chip is more firmly engaged with the chip insertion recess.

In the fourth invention, in the third invention,
A pressing member housing recess and a screw hole are formed on the radially outer side of the chip insertion recess, and a set bolt fastened to the screw hole via a plate spring as the pressing member housed in the pressing member housing recess. The liner chip is pressed.

  According to the above configuration, it is possible to easily and reliably prevent the liner chip from loosening by adjusting the pressing strength of the leaf spring by tightening the set bolt.

In a fifth invention, in any one of the second to fourth inventions,
The liner chip and the chip insertion recess are configured to be engaged via a shim sandwiched between the inclined surface and the contacted surface.

  According to said structure, the position of a liner chip | tip can be easily adjusted by attachment or detachment of a shim.

In a sixth invention, in any one of the first to fifth inventions,
Of the inner peripheral surface of the outer peripheral base, at least a portion not covered by the liner tip is subjected to wear resistance treatment.

  According to the above configuration, since the outer peripheral base itself is not frequently replaced like the liner tip, the durability of the crushing liner is remarkably improved by subjecting the portion not covered by the liner tip to wear resistance treatment.

A seventh invention pulverizing apparatus comprises a pulverization liner according to any one of the first to sixth inventions,
A main body casing to which the outer peripheral base is attached;
A crushing chamber provided in the main body casing and containing the crushing liner.
According to the above configuration, it is possible to provide a pulverizing apparatus in which maintenance of the pulverizing liner is easy and replacement parts are inexpensive.

  According to the above configuration, it is possible to provide a pulverizing apparatus in which maintenance of the pulverizing liner is easy and replacement parts are inexpensive.

  As described above, according to the present invention, a plurality of chip insertion recesses are recessed at intervals in the circumferential direction on the radially inner side of the cylindrical outer periphery base, and liner chips are respectively provided in the plurality of chip insertion recesses. Since the slag is mounted so as to be replaceable, maintenance of the pulverization liner can be facilitated and replacement cost can be reduced.

It is a top view which expands and shows the crushing apparatus and liner chip periphery which made the crushing liner visible. It is a figure which shows the outline of the grinding | pulverization system containing a grinding | pulverization apparatus. It is a perspective view which shows a grinding | pulverization apparatus. It is sectional drawing which shows the lower side of a grinding | pulverization apparatus. It is a top view of the crusher which made the baffle plate visible. It is a top view which expands and shows a part of outer periphery base. It is the VII-VII line expanded sectional view of FIG. A liner chip is expanded and shown, (a) is a top view and (b) is a front view. It is an expanded sectional view showing a liner chip at the time of providing a shim, and its circumference.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

-Configuration of grinding system-
FIG. 2 shows a pulverization system 10 including a pulverization apparatus 1 according to an embodiment of the present invention. The pulverization system 10 includes a feeder 2 that supplies raw materials to the pulverization apparatus 1. The raw material as the object to be processed supplied from the supply machine 2 is supplied to the charging port 11a of the crushing apparatus 1 through the supply rotary valve 3. The product pulverized by the pulverizer 1 is supplied to the bag filter 4, and the pulverized product stored at the lower end of the bag filter 4 can be taken out by opening the bag filter rotary valve 5. An exhaust fan 6 is connected to the downstream side of the bag filter 4 so that the air in the crushing system 10 is discharged into the atmosphere. A drive unit 7 is provided below the pulverizer 1.

  As shown in FIGS. 1 to 4, the pulverization apparatus 1 includes a pulverization chamber 11 into which an object to be processed is charged, and a rotor 12 rotates in a lower portion of the pulverization chamber 11. The rotor 12 is driven by a drive unit 7 provided below the crushing chamber 11. Specifically, the rotating shaft 15a is rotated by a driven pulley 15 driven by a V-belt 14 hung on a driving pulley (not shown) provided at the lower end of the electric motor 13, and the rotating shaft 15a rotates. The integrally connected rotor 12 is rotated.

  The crushing chamber 11 is formed in a cylindrical main body casing 1a. A processing object inlet 11a is formed in the upper part, a wind intake port 11b is formed in the lower part, and the upper end is opened. A classifier 16 driven by, for example, an electric motor is connected to the upper end. The charging port 11a is located at least above the rotor 12 and has an appropriate charging angle. Two wind intake ports 11b are formed in the tangential direction of the crushing chamber 11 symmetrically with respect to the central axis. A partition wall (not shown) having a hole in the center is formed between the wind intake port 11b and the rotor 12.

  Furthermore, as shown in FIG. 5, the airflow from the wind intake port 11 b passes between the bottom surface of the crushing chamber 11 and the partition wall toward the rotary shaft 15 a, passes through the hole in the center of the partition wall, and then the disk of the rotor 12. It passes between 12b and a partition, goes to the crushing chamber 11, and goes to the classifier 16 of the upper part, raising a to-be-processed object. In addition, the wind intake port 11b may be one place, and does not necessarily need to be formed in the tangential direction.

   As shown in FIG. 1, a cylindrical grinding liner 20 is fixed to the inner peripheral surface of the grinding chamber 11. On the other hand, a plurality of crushing blades 12 a are attached to the outer periphery of the rotor 12 so that the tip is close to the crushing liner 20. Specifically, the rotor 12 is formed by attaching plate-shaped crushing blades 12a at predetermined intervals in the circumferential direction on the upper surface of a rotating disk 12b. The tip of the crushing blade 12a slightly protrudes from the outer periphery of the disk 12b, and crushes the object to be processed with the crushing liner 20. The clearance between the crushing liner 20 and the crushing blade 12a is adjusted according to the size and type of the object to be processed, the particle size required after crushing, and the like. The shape of the crushing blade 12a is not particularly limited, and a cylindrical shape, a hammer shape, or the like can be used in addition to the plate shape.

  As shown in FIGS. 1, 6, and 7, the pulverization liner 20 includes an annular (cylindrical) outer peripheral base 21, an inner peripheral liner chip 22, and outer peripheral base 21 upper and lower surface covers. It is comprised with the member 23 (only shown in FIG. 4). The outer peripheral base 21 has recesses 24 for inserting chips at predetermined intervals in the circumferential direction. A leaf spring accommodating portion 25 is continuously formed on the outer peripheral side of the chip insertion recess 24. A set bolt hole 26 as a screw hole is formed behind the leaf spring accommodating portion 25. As shown in FIG. 7, for example, the plate spring 25 a as a pressing member is formed by forming a ridge at the center of the metal plate, and is accommodated in the plate spring accommodating portion 25 together with the pressing plate 25 b. The leaf spring 25a is configured to be pressed by the set bolt 28 and press the tip side inclined surface 22a of the liner tip 22 against the contacted surface 24a via the pressing plate 25b. Thus, the plate spring 25a has the same action as a general spring washer, and the pressing plate 25b has the same action as a general washer.

  As shown in FIG. 6, the chip insertion recess 24 is formed so as to penetrate the outer peripheral base 21 in the axial direction. An abutted surface 24a that is inclined so as to be narrowed is formed. The leaf spring accommodating portion 25 is also a groove having a square cross section penetrating in the axial direction, and a set bolt hole 26 penetrates radially outward in the vicinity of the center portion on the radially outer side.

  The outer peripheral base 21 can use a general metal structure material, and a ceramic film is formed on the inner peripheral surface other than the chip insertion recess 24 for wear resistance. For the coating on the inner peripheral surface, a cemented carbide material can be used in addition to ceramics. For film formation, known compounding means such as thermal spraying, adhesion, and casting can be employed. Since the outer peripheral base 21 itself is not frequently replaced like the liner chip 22, the durability of the crushing liner 20 can be remarkably improved by subjecting the portion not covered by the liner chip 22 to wear resistance.

  As shown in an enlarged view in FIG. 8, the liner chip 22 has, for example, a substantially isosceles trapezoidal cross section, and chip-side inclined surfaces 22a whose intervals are narrowed toward the inner peripheral side in the same manner as the contacted surface 24a. And has the same height as the outer peripheral base 21. A crushing recess 22b is formed in the vicinity of the top face of the pair of tip side inclined surfaces 22a to improve crushing efficiency. The liner tip 22 is made of a wear-resistant material such as cemented carbide.

  As shown in FIG. 9, a plate-shaped shim 27 having the same shape as the contact surface 24a of the chip insertion recess 24 is sandwiched between the chip insertion recess 24 and the liner chip 22 as necessary. Be able to. As a result, when the liner tip 22 is worn, the shim 27 can be removed and the liner tip 22 can be moved to the inner peripheral surface and pressed. At this time, the shim 27 may be sandwiched between only one of the opposed contact surfaces 24a or both. Alternatively, a plurality of shims 27 may be sandwiched and the shims 27 may be removed step by step according to the degree of wear. Thus, the height of the liner chip 22 can be adjusted by attaching and detaching the shim 27. A shim 27 having substantially the same shape (substantially U shape) as the cross section of the chip insertion recess 24 may be used. In this case, since they are integrated, the engaging operation with the shim 27 interposed therebetween is facilitated.

-Operation of the grinding system-
In the pulverization system 10 configured as described above, the object to be processed input to the supply machine 2 is input from the supply machine 2 to the input port 11 a at the upper part of the pulverization chamber 11 and falls onto the rotor 12.

  Next, the object to be processed is conveyed radially outward by centrifugal force, and then pulverized between the pulverizing blade 12 a and the pulverizing liner 20.

  Next, the object to be processed is transported to the classifier 16 above the crushing chamber 11 by the airflow from the wind intake port 11 b below the crushing chamber 11. In the classifier 16, only the workpiece having a predetermined size passes and is discharged from the discharge port 11c. An object to be processed that is not sufficiently pulverized falls into the pulverization chamber 11 by its own weight and is pulverized again.

  Next, the product pulverized by the pulverizing apparatus 1 is supplied to the bag filter 4, and the pulverized product is stored at the lower end of the bag filter 4. Then, the bag filter rotary valve 5 is opened to take out the pulverized product.

-Replacement method-
Next, a method for attaching the grinding liner according to the present embodiment will be described.

  First, the liner chip 22 is inserted into and engaged with each chip insertion recess 24 of the outer peripheral base 21 from the axial direction (vertical direction). At this time, the shim 27 is sandwiched between the engaging portions as necessary. At this time, the chip-side inclined surfaces 22a whose intervals become narrower toward the inner periphery of the liner chips 22 are engaged with the contact surfaces 24a that are similarly inclined of the chip insertion recesses 24. Pulling out to the inner peripheral side is reliably prevented.

  Next, the leaf spring 25 a and the pressing plate 25 b are inserted into the leaf spring accommodating portion 25. At this time, the leaf spring 25a presses the tip side inclined surface 22a of the liner tip 22 against the contacted surface 24a of the tip insertion recess 24, so that the liner tip 22 is more firmly engaged with the tip insertion recess 24. , Can ensure proper clearance.

  Next, the set bolt 28 is screwed into the set bolt hole 26 to press the leaf spring 25a. The set bolt 28 prevents the head from protruding from the outer peripheral base 21. Thus, since the set bolt 28 for fixing the liner chip 22 does not protrude from the outer peripheral base 21, the grinding liner 20 can be easily attached, and special processing for avoiding the set bolt 28 in the grinding chamber 11 is necessary. Absent.

  Next, the cover member 23 is fixed above and below the outer peripheral base 21.

  When the liner tip 22 is worn during use, the shim 27 is removed and the set bolt 28 is tightened.

  On the other hand, at the time of replacement, the liner bolt 22 can be easily removed by loosening the set bolt 28.

  Thus, in this embodiment, since the outer periphery base 21 and the liner chip 22 are separated, the liner chip 22 is downsized and inexpensive. Further, since the shape of the liner chip 22 itself is simplified, the processing is simplified and a high-hardness wear-resistant material can be used.

  Therefore, according to the present embodiment, the maintenance of the pulverization liner 20 can be facilitated and the replacement cost can be suppressed. Further, the pulverization apparatus 1 can be obtained in which the pulverization liner 20 is easily maintained and replacement parts are inexpensive.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above embodiment, the classifier 16 driven by the electric motor is provided and the particle size to be classified is adjusted by the number of rotations of the electric motor, but by adjusting the wind speed flowing in without using power, It is good also as a cyclone classifier which adjusts a particle size. Further, the classifier 16 is not necessarily required, and if not provided, the discharge port 11c may be provided at the upper portion of the crushing chamber 11.

  The pulverization method includes a rotor 12 in the pulverization chamber 11 (rotary type), and in addition to a method of pulverization, crushing, and grinding between the pulverization blade 12a and the pulverization liner 20, the rotor 12 is A vortex type or the like in which the object to be processed is rotated in a swirl flow and collides with the crushing liner 20 can be employed without being provided.

  In the above embodiment, the crushing liner 20 is fixed in the crushing chamber 11, but it may be attached to the crushing chamber 11 so as to be capable of rotating. In this way, the crushing force and the crushing efficiency are improved.

  Further, instead of the crushing blade 12a, a hard uneven portion may be formed on the outer peripheral surface of the rotor 12 as a crushing portion. This shape is particularly suitable for the vortex type.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

1 Crusher
1a Body casing
2 feeder
3 Rotary valve for supply
4 Bug filters
5 Rotary valve for bag filter
6 Exhaust fan
7 Drive unit
8 Oil circulation pump
10 Grinding system
11 Crushing chamber
11a inlet
11b Wind intake port
11c outlet
12 Rotor
12a grinding blade
12b disc
13 Electric motor
14 V belt
15 Driven pulley
15a Rotating shaft
16 classifier
20 Grinding liner
21 Perimeter base
22 liner chip
22a Tip side inclined surface
22b Crushing recess
23 Cover member
24 Recess for chip insertion
24a Contacted surface
25 Leaf spring housing (pressing member housing recess)
25a Leaf spring (pressing member)
25b Press plate
26 Set bolt holes (screw holes)
27 Sim
28 set bolts

Claims (5)

In the crushing liner that crushes the abutted material,
A cylindrical outer base attached to the main casing of the crusher;
A plurality of chip insertion recesses that are recessed integrally with a space in the circumferential direction on the radially inner side of the outer periphery base;
A plurality of liner tips having higher wear resistance than the outer peripheral base, which are replaceably attached to the plurality of chip insertion recesses, respectively .
The liner chip has a pair of inclined surfaces whose intervals are narrowed toward the inner peripheral side on the side surface,
The recess for inserting a chip has a pair of abutting surfaces inclined so that a distance from each other is narrowed toward an inner peripheral side with which an inclined surface of the liner chip is engaged,
A pressing member that presses the liner chip toward the inner circumferential side is provided in the chip insertion recess,
On the radially outer side of the chip insertion recess, a pressing member receiving recess and a screw hole are formed, and a screw fastened to the screw hole via a plate spring as the pressing member received in the pressing member receiving recess. Pressing the pair of inclined surfaces of the liner chip against the pair of contacted surfaces,
The liner chip and the chip insertion recess are engaged via a shim sandwiched between the inclined surface and the contacted surface, and the shim is removed when the liner chip is worn. A liner for pulverization, characterized in that the liner chip can be pressed to the inner peripheral side . The grinding liner according to claim 1,
The shim is sandwiched between only one of the opposed contact surfaces.
A liner for grinding. The grinding liner according to claim 1,
A plurality of the shims are sandwiched between one or both of the opposed contact surfaces, and the plurality of shims can be extracted in stages according to the degree of wear of the liner tip. Have
A liner for grinding. In grinding liner according to claim 1, any one of 3,
A pulverization liner, wherein at least a portion of the inner peripheral surface of the outer peripheral base that is not covered with the liner chip is subjected to wear resistance treatment. A grinding liner according to any one of claims 1 to 4 ,
A main body casing to which the outer peripheral base is attached;
A pulverization apparatus comprising: a pulverization chamber provided in the main body casing and accommodating the pulverization liner.

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